These Premium Shimano 110/4 bcd compatible oval chainrings are designed for Shimano cranks like Dura-Ace 9000, Ultegra 6800, 105- 5800 and others.
These are finest oval chainrings on the market in terms of shifting, smoothness of pedalling and manufacturing quality. Not compatible with FSA cranks.

Size: (Mass +/-1g): 34T (31g), 36T (37g), 38T (41g), 50T (120g), 52T (137g)
Colour: Black, Grey
Ovality: Optimised to each size separately. 34T- 6.5% ; 36T- 11.4%, 38T- 11.4%, 50/52 - 10.3% ; Timing of 108 -109.5° after TDC (top dead centre) - Ideal for road climbing. Patent Pending

BOLTS
For Outer chainring please order Long bolts
Changing Inner chainring to oval only? use original bolts

Advantages of Absolute Black Road Oval chainrings:

• One of a kind special oval shape that helps you climb easier and faster (Patent Pending)
  
• Over 15% stiffer than Rotor Qrings due to thicker, 5mm construction
  
• Bespoke Absolute Black 6 point ramp and recess shifting design shifts better than any other brand and model of oval chainring
  
• Finest design that provides excellent strength to weight ratio
  
• You will not "feel" the oval shape while pedalling
  
• Your pedalling action will feel smoother
  
• Helps reduce stress on knees and helping your legs remain fresher for longer
  
• You will be able to maintain better cadence while climbing
  
• Reduces possibility of leg cramps
  
• You will reduce chainring/cog shifts by at least 15%

Shimano Dura-Ace 9000, Ultegra 6800, Shimano 105 5800, Tiagra 4700. Compatible with Di2 & Pioneer, SRM and other power meters